Milan, Tennessee has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9 °C (low) to 21.3 °C (high). Annual precipitation averages 1426.2 Millimeters. Milan is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.4 °C | 8.6 °C | 104.9 mm |
| February | -0.6 °C | 11.1 °C | 120.4 mm |
| March | 3.6 °C | 16.2 °C | 139.7 mm |
| April | 8.7 °C | 21.9 °C | 130.56 mm |
| May | 14.2 °C | 26.3 °C | 155.45 mm |
| June | 18.6 °C | 30.3 °C | 111.51 mm |
| July | 20.6 °C | 31.9 °C | 109.98 mm |
| August | 19.4 °C | 31.8 °C | 92.96 mm |
| September | 15.3 °C | 28.7 °C | 104.14 mm |
| October | 8.5 °C | 22.8 °C | 97.03 mm |
| November | 3 °C | 15.8 °C | 121.92 mm |
| December | -0.6 °C | 10.2 °C | 137.67 mm |
| Annual | 9 °C | 21.3 °C | 1426.22 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |